Gliding surface for operating in air or water.



H. REI SSNBR, GLIDING SURFACE FOR OPERATING IN AIR 0R WATER.

APPLIOATION FILED OOT.2B, 1909.

AU 1 9 1 7! 1 m d m M a P Inventor: HansReissner per After ey aaaoo'a.

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To all whom it may concern:-

Be it known that l, HANs- Rnissnnn, doctor, en'gine'eryand professor in the Royal Folytechnicum at AiX-la-Cha elle, Germany, a subject of the King-of 'russia, residing at No. 166 Liitticherstrasse, AiX-la- Ghapelle, in the Kingdom of Prussia, Empire of Germany, have invented certain new and useful improvements in Gliding Sun faces for @perating in Air or Water; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My resent invention relates to surfaces intended to glide in air or water, such as are employed on air-ships, or other aerial craft-s such as aero-planes or kite-fliers; or

on hydro-planes, rudders, propellers and so forth, and the object of my invention is to construct surfaces of the above-named kind which shall cut air or water with great ease and at the same time fulfil the conditions as to solidity, lightness, convenient manufacture and weatherproofness. Gliding surfaces of this kind were hitherto manufactured from thin boards of wood and sheetmetal for narrow planes, and from longitudinal and transverse ribs for larger planes, to which end over the frame-work of ribs a suitable fabric was stretched. Both kinds of construction, however, show the drawback either to cause a great obstruction to the current of air on account of their thickness, or on account of the ribs projecting out of the surface; or they lose their shape if made of wood, whereas their manufacture ofiers great difficulties when their profiles are executed in metal. Besides this the fabric employed for stretching over the framework shows great elastic and erma nent deformations at the wrong pace or places, causes great surface-friction, and de mands an especial diagonal stidening, All these drawbacks are avoided by the novel construction of my gliding surface which consists of a corrugated thin plate with its corrugations running in the direction. of motion, and stifl'ening bands arranged transversely upon both sides of said plate in a manner to offer the least resistance to mo: tion, as will be more fully explained below.

lln the accompanying drawing :-Figure 1 is a plan-view of my present invention. Fig. 2 is a longitudinal sectional view taken ou line 2 -2 of-Figrl. Fig; 3 is a cross sectional view taken on, line 3-3 of Fig.1.

Fig/i shows difierent shapes of corrugations 0f the corrugated plate. lln "putting my invention into practice a corrugated very thin platef 0;, the corruga:

tions of which run parallel to each other'in' the direction of motion indicated by the arrow in Fig. 2, is provided with the necessary transversal ribs by securing in any suitable manner on both sides of said corrugated plate on top of the undulations flat bands 5 or flat tubes 1). lln doing so any two bands and the corrugations lying between them form a girder capable of withstanding traction, compression, bending and buckling. 1h gliding surface-thus constructed will odor but very little resistance in the direction of motion, and the flat bands or flat tubes themselves act as gliding and bearing surfaces. The diagonal stifliening necessary between two adjacent transversal bands l) or flat tubes 5 is accomplished by the corrugated plate itself. A girder of this construction can either serve as principal rib of a mono plane capable of resisting any bending moments, or as a compression or traction chord of the girder of multiplane. lln case the corrugations lying between adjacent bands or tubes and forming the lacing of this girder should be too weak to resist the shearing forces of the girder, a reinforcement can. be efiected by employing a corrugated reinforcing strip 0 as indicatedin Figs. 1 and 3.

The corrugation may be undulated, as shown in Fig. 2;, or triangular as indicated in several ways in Fig. 4t- Besides this the corrugated plate might be made of transparent material in order to make it didicult to detect the sliding surface from afar.

The flattened tube 2') might be employed for the circulation of the water employed for cooling the motor. The corrugations perform at the same time the function of stabilizing and steering around the vertical axis.

ll claim 1. A. gliding surface for operating in air or water consisting of a corrugated thin late with its corrugations running in the irection of "motion, and stifiening bands arranged transversely upon both sides of said plate in'a manner to ofier the least resistance to motion, I

2. Agliding surface for operating in air ill a biplane or of a or water consisting of a comparatively thin corrugated metal plate with its corrugations running in the direction of motion, and flat stifi'ening bands arranged upon both sides of said plate transversely to said corrugations in a manner to ofier the least resistance to motion.

3. A gliding surface for operating in air or vWater consisting of a very thin corrugated plate with its corrugations running in V I the direction of motion and stiffeningbands composed of fiat tubes and arranged upon both sides of said plate transversely to said corrugations in a manner to ofi'er the least resistance to motion. 

